20180716
16302200
1.0
FGDC CSDGM Metadata
FALSE
MagneticAnomalyPnt
-93.753117
-74.914360
28.875708
38.440807
1
-
-
MagPntHasLinks
Relationship
002
Geographic
GCS_North_American_1983
Angular Unit: Degree (0.017453)
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20210210
14371700
20210210
14371700
Oceanographer
U.S. Department of Interior, Bureau of Ocean Energy Management, Marine Minerals Program
(703) 787-1747
45600 Woodland Road, VAM-LD
Sterling
VA
20166
US
marineminerals@boem.gov
Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
http://www.boem.gov/Marine-Minerals-Program
20210210
ArcGIS Metadata
1.0
MagneticAnomalyPnt
2021-02-10
U.S. Department of Interior, Bureau of Ocean Energy Management, Marine Minerals Program
Sterling, VA
U.S. Department of Interior, Bureau of Ocean Energy Management, Marine Minerals Program
vector digital data
The Magnetic Anomaly Point feature class is a collection of points representing the location of man-made ferrous objects on or below the seabed that were identified during magnetometer surveys conducted as part of geophysical cultural/archaeological resource investigations in the immediate vicinity of offshore borrow areas and dredged material conveyance corridors. The points may represent objects of cultural/archaeological significance, submerged infrastructure (e.g. pipelines), or unidentified debris that might affect the ability of the Bureau of Ocean Energy Management (BOEM) and its partners and/or contractors to perform non-energy marine mineral acquisition tasks. The attribute table of this feature class contains summary information pertaining to each anomaly, including (but not limited to) anomaly ID, date, x/y coordinates, project name, and information related to data acquisition (magnetometer type, sensor configuration, amplitude, duration, signal type, etc.). The associated survey report can be accessed via the related Link Documents table. This dataset will be updated regularly as new and existing data are incorporated in to the Marine Minerals Information System geodatabase.
This dataset supports the Bureau of Ocean Energy Management's (BOEM) Marine Minerals Program (MMP) mission of managing non-energy minerals (primarily sand and gravel) on the OCS. The data and information provided in this dataset helps facilitate these management efforts via the identification of potentially sensitive (e.g. archaeological/cultural) areas, submerged infrastructure, or unidentified objects that should be avoided during dredging operations in their immediate vicinity.
US
U.S. Department of Commerce, 1995, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard (FIPS) 10-4): Washington, D.C., National Institute of Standards and Technology.
GULF OF MEXICO
ATLANTIC OCEAN
GLOBAL OCEAN
NORTH ATLANTIC OCEAN
SEA FLOOR
NASA/GCMD Location Keywords
Vertical Location>Sea Floor
NASA/Global Change Master Directory (GCMD) Earth Science Keywords
Seafloor
Offshore
Geophysical Survey
Ocean
Magnetometer Survey
Anomaly
Gamma
Magnetic Anomaly
Marine Geology
SeaDataNet Common Vocabularies
GULF OF MEXICO
Seafloor
Offshore
Geophysical Survey
Ocean
ATLANTIC OCEAN
Magnetometer Survey
Vertical Location>Sea Floor
Anomaly
Marine Geology
Gamma
GLOBAL OCEAN
NORTH ATLANTIC OCEAN
Magnetic Anomaly
SEA FLOOR
US
This data is in the public domain and has no access restrictions.
FIPS 199 Security Classification
There are no restrictions; the data is releasable to the public.
The Bureau of Ocean Energy Management (BOEM) provides the data for use "as is". BOEM provides this information with the understanding that it is not guaranteed to be accurate, correct or complete and conclusions drawn from such information are the responsibility of the user. While every effort has been made to ensure the accuracy, correctness and timeliness of materials presented within the limits of the current state of the art, BOEM assumes no responsibility for errors or omissions, nor as a result of the failure of the data to function on a particular system. BOEM makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from or actions undertaken on the basis of, such data and information are the sole responsibility of the user. The maps shown here are for illustration and planning purposes only and are not suitable for site-specific decision making. The data are not suitable for navigational purposes. Information found here should not be used for making financial or any other commitments. This data was developed by the U.S. Government; no other proprietary rights may be attached to them nor may they be sold to the U.S. Government as part of any procurement of products or services. Public domain data from the U.S. Government are freely redistributable with proper metadata and source attribution. Please recognize the Bureau of Ocean Energy Management (BOEM) as the source of this information.
Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270
-93.753117
-74.91436
28.875708
38.440807
publication date
2021-02-10
None
1
-93.753117
-74.914360
38.440807
28.875708
20220210
The MMIS data model utilizes a hierarchical structure where an ESRI enterprise geodatabase represents the top tier, and feature datasets and raster catalogs are the secondary tiers which contain groupings of similar data layers. These individual data layers were identified by MMP as important, and they make up the bottom tier. Most individual vector layers and tables are collections of data from multiple sources and across multiple dates. Extensive research went into the construction of (1) the hierarchical groupings of data (primarily by subject matter and file format) and (2) technical aspects of the data model. Data within the geodatabase was consolidated to reduce redundancy, resulting in several stand-alone tables. Relationship classes utilizing global IDs were built between vector layers and stand-alone tables in order to link disparate data. The entire MMIS data model was originally constructed using ESRI ArcGIS Diagrammer, a tool that creates and edits a geodatabase schema. The resulting geodatabase structure, data, and relationship classes were reviewed thoroughly by multiple individuals using ESRI Geodatabase Diagrammer Add-In, ESRI ArcGIS, and Microsoft Visio. ESRI Geodatabase Diagrammer Add-In creates a detailed break-down of the geodatabase and a Visio data model poster.
The spatial data and attribute tables loaded into the MMIS data model are believed to be complete, in regards to maintaining each data layer/table after retrieving it from its source. Please refer to the scientific reports, as well as BOEM MMP Leases, negotiated agreements, Memoranda of Agreements, and project completion reports, for discussions of the results on the corresponding source data. Most individual vector layers and tables in the MMIS data model are collections of data from multiple sources and across multiple dates. Most likely, these MMIS layers/tables will continue to have more data loaded in the future, therefore expanding upon the list of sources and dates. Additionally, the Pacific Outer Continental Shelf (OCS) and Alaska OCS regions may eventually be added to the data model, aside from the Atlantic and Gulf of Mexico OCS regions.
Please refer to the scientific reports, as well as Bureau of Ocean Energy Management (BOEM) Marine Minerals Program (MMP) Leases, negotiated agreements, cooperative agreements, Memoranda of Agreements, and project completion reports, for accuracy statements on the corresponding source data. These documents are referenced in the attribute tables, where appropriate. In regards to attribute assignment in the Marine Minerals Information Systems (MMIS) data model, every effort was made to load source data into MMIS without error or modification. Some attributes contain domain restrictions in an effort to standardize the field entries and to decrease potential inconsistent entries (e.g., spelling, grammar, typographical errors, and subject matter) in the attribute.
unknown
unknown
The spatial and tabular data presented in this dataset was identified by the Bureau of Ocean Energy Management (BOEM) Marine Minerals Program (MMP) for the MMIS project as being critical for MMP's decision making and management responsibilities of federal Outer Continental Shelf (OCS) mineral exploration and federal non-energy sand/gravel lease activities. The data was retrieved directly from BOEM, or another government entity, in the form of one or more ArcGIS shapefiles, Microsoft Excel spreadsheets, XYZ files, field logs, project reports, PDF tables, and maps. This data was linked to source documents including environmental study reports and data deliverables associated with Negotiated Non-Competitive Leases or Memorandum of Agreements between BOEM and partnering agencies or contractors. First, the source data was reformatted, if needed, into an ESRI ArcGIS compatible format and then loaded into a project-specific geodatabase in its native projection. Second, the data was reprojected into the NAD83 geodetic reference system and then loaded into corresponding layers and tables in the MMIS enterprise geodatabase. Relationship classes were made between disparate layers and tables to join related data. Lastly, for use in the web application, a duplicate "publishable" MMIS enterprise geodatabase was created in a Web Mercator (Auxiliary Sphere) projection. For specific process information regarding acquisition, please reference the individual study reports.
2021-02-10
Lineage varies by data source. Some data was contributed, some was mapped/reformatted from scientific and technical reports for MMIS.
BOEM Archives
BOEM Archives
2021-02-10
U.S. Department of Interior, Bureau of Ocean Energy Management, Marine Minerals Program
Multiple investigators and projects
document
publication date
2002-01-01
2021-02-10
2618
MagneticAnomalyPnt
Identifies and describes anomalies created from a magnetometer survey
BOEM
Feature Class
2618
ProjectName
Name of project/cruise/study
BOEM
Name of project/cruise/study
Project Name
String
100
0
0
NRHP_Eligibility
Potentially eligible, determined eligible, or not eligible; a qualified marine archaeologist has assessed whether a potential cultural target is worthy of nomination to the National Register of Historic Places (NRHP); natural targets are "not eligible" by default; coordinate with BOEM archaeologists for designations/eligibility
BOEM
Eligible Eligible
Eligible Eligible
BOEM
Not Eligible
Not Eligible
BOEM
Potentially
Potentially
BOEM
NRHP Eligibility
String
20
0
0
SonarTargetID
ID of associated/correlated sonar anomaly/target identified during survey (if applicable)
BOEM
ID of associated/correlated sonar anomaly/target identified during survey (if applicable)
Sonar Target ID
String
30
0
0
SensorConfiguration
Such as a single instrument total field magnetometer or multiple sensors in a gradiometer configuration
BOEM
Such as a single instrument total field magnetometer or multiple sensors in a gradiometer configuration
Sensor Configuration
String
50
0
0
VerticalDatum
Vertical datum (e.g. MLLW, NAVD88, etc.) for water depth
BOEM
Vertical datum (e.g. MLLW, NAVD88, etc.) for water depth
Vertical Datum
String
50
0
0
SurveyNumber_ID
Specific numerical- or letter-based designation a contractor may give to an individual survey or reference in a survey report
BOEM
Specific numerical- or letter-based designation a contractor may give to an individual survey or reference in a survey report
Survey Number or ID
String
100
0
0
MagnetometerType
Specific type of scalar or vector magnetometer
BOEM
Specific type of scalar or vector magnetometer
Magnetometer Type
String
50
0
0
Longitude_DD
Longitude_DD
BOEM
Longitude_DD
Longitude_DD
Double
8
38
8
SeaState
Sea surface conditions that may affect sensor altitude consistency and data accuracy; if entries are using Beaufort scale or Douglas scale, then please specify which scale is being referenced
BOEM
Sea surface conditions that may affect sensor altitude consistency and data accuracy; if entries are using Beaufort scale or Douglas scale, then please specify which scale is being referenced
Sea State
String
250
0
0
LeaseBlock
BOEM OCS lease block(s) where the survey was completed
BOEM
BOEM OCS lease block(s) where the survey was completed
Lease Block
String
20
0
0
SignalType
Anomaly signal type: M (unspecified monopole), M+ (positive monopole), M- (Negative Monopole), D (Dipole), MC (multi-component)
BOEM
M
Unspecified Monopole
BOEM
MC
Multi-Component
BOEM
M-
Negative Monopole
BOEM
M+
Positive Monopole
BOEM
D
Dipole
BOEM
Signal Type
String
2
0
0
SensorDepth_feet
Depth of sensor (in feet) below water surface
BOEM
Depth of sensor (in feet) below water surface
Sensor Depth (feet)
Double
8
38
8
SensorAltitude_feet
Height of sensor (in feet) above the seabed
BOEM
Height of sensor (in feet) above the seabed
Sensor Altitude (feet)
Double
8
38
8
SignalDescription
Verbal description of anomaly or associated feature (e.g. submerged pipeline, shipwreck, ferrous metal debris, unknown, etc.)
BOEM
Verbal description of anomaly or associated feature (e.g. submerged pipeline, shipwreck, ferrous metal debris, unknown, etc.)
Signal/Anomaly Description
String
250
0
0
Y
Y coordinate (Latitude) of anomaly in original datum/projection
BOEM
Y coordinate (Latitude) of anomaly in original datum/projection
Y
String
20
0
0
Number_of_Sensors
Number of magnetometer sensors used during survey; 1, 2, 3, etc.
BOEM
Number of magnetometer sensors used during survey; 1, 2, 3, etc.
Number of Sensors Used
String
50
0
0
ShotPoint
Along-track shot point (a.k.a. fix number or event fix) number corresponding with location of anomaly
BOEM
Along-track shot point (a.k.a. fix number or event fix) number corresponding with location of anomaly
Shot Point Number
Double
8
38
8
Latitude_DD
Latitude_DD
BOEM
Latitude_DD
Latitude_DD
Double
8
38
8
DateTime
Mm/dd/yyyy hh:mm:ss; exact date and time the anomaly was recorded; important for verifying the anomaly was or was not an external-source temporal anomaly versus a spatial anomaly in Earth's magnetic field and QA / QC-ing for geomagnetic storm-caused ionospheric scintillation effects, which undermine GIS accuracy
BOEM
Mm/dd/yyyy hh:mm:ss; exact date and time the anomaly was recorded; important for verifying the anomaly was or was not an external-source temporal anomaly versus a spatial anomaly in Earth's magnetic field and QA / QC-ing for geomagnetic storm-caused ionospheric scintillation effects, which undermine GIS accuracy
Date and Time Stamp
Date
8
0
0
AssociatedSurveyFiles
Should contain file path to folder that contains additional files from the survey that could be referenced for mag. data accuracy (contours, grids, etc.); not live hyperlink unless hosted on an external source
BOEM
Should contain file path to folder that contains additional files from the survey that could be referenced for mag. data accuracy (contours, grids, etc.); not live hyperlink unless hosted on an external source
Associated Survey Files
String
1000
0
0
StudyID
Study ID of the study in which the feature was identified. Study ID following the convention noted in the Data Management Plan
BOEM
Study ID of the study in which the feature was identified. Study ID following the convention noted in the Data Management Plan
Study ID
String
250
0
0
State
Location relative to closest state; state funded for OCS study, two letter postal code
BOEM
Location relative to closest state; state funded for OCS study, two letter postal code
State
String
2
0
0
AvoidanceBuffer_feet
Recommended avoidance buffer radius in feet
BOEM
Recommended avoidance buffer radius in feet
Avoidance Buffer (feet)
Double
8
38
8
LineNumber
Geophysical survey line ID number in which anomaly was recorded/observed
BOEM
Geophysical survey line ID number in which anomaly was recorded/observed
Line Number or ID
String
30
0
0
AnomalyGroundTruthed
Has the target been visually inspected in situ, such as by still image, video footage, or diver investigation? Values "Y","N" or null
BOEM
N
No
BOEM
Y
Yes
BOEM
Anomaly Ground-truthed
String
3
0
0
Duration_feet
Along-track duration (in feet) of anomaly signal
BOEM
Along-track duration (in feet) of anomaly signal
Duration (feet)
Double
8
38
8
WaterDepth_feet
Water depth (feet) in immediate vicinity of anomaly; specify vertical datum in vertical datum field
BOEM
Water depth (feet) in immediate vicinity of anomaly; specify vertical datum in vertical datum field
Water Depth (feet)
Double
8
38
8
GlobalID
Globally Unique Identifier
Esri
Globally Unique Identifier
Global ID
GUID
38
0
0
AnomalyID
Unique feature ID assigned during survey
BOEM
Unique feature ID assigned during survey
Anomaly ID
String
30
0
0
SHAPE
Feature geometry
Esri
Feature geometry
SHAPE
Geometry
4
0
0
Comment
Additional comments or recommendations (e.g. related to survey conditions, interpreted anomaly, notable uncertainties, etc.)
BOEM
Additional comments or recommendations (e.g. related to survey conditions, interpreted anomaly, notable uncertainties, etc.)
Comment
String
250
0
0
X
X coordinate (Longitude) of anomaly in original datum/projection
BOEM
X coordinate (Longitude) of anomaly in original datum/projection
X
String
20
0
0
Override
Overrides Cartographic Representation
Esri
Overrides Cartographic Representation
Override
Blob
0
0
0
OBJECTID
Internal feature number
Esri
Internal feature number
OBJECTID
OID
4
10
0
MagPnt_GlobalLinkID
Globally unique identifier of related reports in Link Documents table
BOEM
Globally unique identifier of related reports in Link Documents table
Global Link ID
GUID
38
0
0
GroundTruthingMethod
"N/A" if no ground-truthing has occurred; if so, note the survey method (image still, video / ROV / AUV footage, diver, etc.)
BOEM
"N/A" if no ground-truthing has occurred; if so, note the survey method (image still, video / ROV / AUV footage, diver, etc.)
Ground-truthing Method
String
50
0
0
Amplitude_gammas
Peak signal strength (gammas), where 1 gamma = 1 nano Tesla
BOEM
Peak signal strength (gammas), where 1 gamma = 1 nano Tesla
Amplitude (gammas)
Double
8
38
8
RuleID
Assigns Cartographic Representation
Esri
1
Magnetic Anomaly Pnt
BOEM
-1
Free Representation
BOEM
RuleID
Integer
4
10
0
Contractor
Name of contractor or agency that collected the data
BOEM
Name of contractor or agency that collected the data
Contractor
String
50
0
0
Date
Date of survey (use first or last day of survey if data acquisition occurred over multiple days)
BOEM
Date of survey (use first or last day of survey if data acquisition occurred over multiple days)
Date
Date
8
0
0
Interpreter
Name of person who processed and/or interpreted these data
BOEM
Name of person who processed and/or interpreted these data
Interpreter
String
50
0
0
GlobalID_1
Globally Unique Identifier
BOEM
Globally Unique Identifier
GlobalID_1
GlobalID
38
0
0
CoordinateSystem
Original horizontal datum and units (meters, feet, etc.) used during data acquisition
BOEM
Original horizontal datum and units (meters, feet, etc.) used during data acquisition
Coordinate System
String
50
0
0
SourceDataFile
File path to source data file (e.g. original .csv, .shp, etc. file containing the points); not live hyperlink unless data are only hosted on an external source
BOEM
File path to source data file (e.g. original .csv, .shp, etc. file containing the points); not live hyperlink unless data are only hosted on an external source
Source Data File
String
250
0
0
Identifies and describes point anomalies identified during a magnetometer survey. Mapping magnetic anomalies provides crucial information for a number of coastal and marine spatial planning applications including selection of appropriate offshore construction sites, and planning of sand/gravel mining operations. The Bureau of Ocean Energy Management (BOEM) can use this information when managing Outer Continental Shelf (OCS) non-energy mineral resources in order to ensure that the removal and relocation of sand is conducted in a safe and environmentally sound manner, and that any potentially adverse impacts on the marine, coastal, or human environments are avoided or minimized.
BOEM
Feature Class
dataset
EPSG
6.12(3.0.1)
Simple
FALSE
2618
TRUE
FALSE